| 自保护药芯焊丝焊缝中的气体 |
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| 引用本文： | 喻萍,田志凌,潘川,薛振奎.自保护药芯焊丝焊缝中的气体[J].焊接学报,2007,28(2):67-70. |
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| 作者姓名： | 喻萍 田志凌 潘川 薛振奎 |
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| 作者单位： | 1. 钢铁研究总院,先进钢铁材料技术国家工程研究中心,北京,100081
2. 中国石油天然气管道局,科学研究院,河北,廊坊,065000 |
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| 摘 要： | 自保护药芯焊丝焊缝中N元素含量较高在0.025%～0.035%内.分析了药芯成分(氟化物、碳酸盐和固氮元素铝)对焊缝中氮气孔的影响规律.焊接工艺参数对焊缝中氮气孔的产生也有重要的影响,从防止焊缝产生气孔的角度出发,焊接工艺参数的最佳取值范围为焊接电流220～280 A,电弧电压18～24 V,焊丝伸出长度20～30 mm,极性采用直流正接.自保护药芯焊丝焊缝中不容易产生氢气孔和CO,CO2气孔.
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| 关 键 词： | 自保护药芯焊丝 氮气孔 影响因素 |
| 文章编号： | 0253-360X（2007）02-067-05 |
| 收稿时间： | 2006/3/24 0:00:00 |
| 修稿时间： | 2006-03-24 |
Gas in weld for self-shielded flux-cored arc welding |
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| YU Ping,TIAN Zhiling,PAN Chuan and XUE Zhenkui.Gas in weld for self-shielded flux-cored arc welding[J].Transactions of The China Welding Institution,2007,28(2):67-70. |
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| Authors: | YU Ping TIAN Zhiling PAN Chuan and XUE Zhenkui |
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| Affiliation: | National Engineering Research Center of Advanced Steel Technlogy, Centeral Iron & Steel Research Institute, Beijing 100081, China,National Engineering Research Center of Advanced Steel Technlogy, Centeral Iron & Steel Research Institute, Beijing 100081, China,National Engineering Research Center of Advanced Steel Technlogy, Centeral Iron & Steel Research Institute, Beijing 100081, China and Research Institute of China Petroleum Pipeline Bureau, Langfang 065000, Hebei, China |
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| Abstract: | The nitrogen content in the weld for FACW-S(flux cored arc welding-self-shielded) is about 0.025%-0.035%,which is higher than other welding materials.The effects of flux ingredients(for example:fluoride,carbonate and nitrogen fixation substance Al)on the nitrogen gas pore were studied.The welding parameters also have an important influence on the nitrogen gas pore.Considering the gas pore in the weld,the welding parameters should be 220-280 A welding current,18-24 V welding voltage,20-30 mm wire extension and direct current stright polarity.Hydrogen gas pore and CO/CO2 gas pore are not easy to form in FCAW-S weld. |
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| Keywords: | self-shielded flux-cored wire nitrogen porosity influencing factors |
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